Milling-machine.



F. HOLZ.

MILLING MACHINE.

(No ModalJ (Anulication filed Mar. 26, 1900.)

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MILLING MACHINE.

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No. 658,777. Patented Oct. 2, won. F. HOLZ.

MILLING MACHINE.

(Application filed Mar. 26, 1900.)

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No. 658,777. Patented Oct. 2, I900. F HULZ MILLING MACHINE.

(Application filedmar. 26, 1900.)

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No. 658,777 Patented Oct. 2, I900.

F. HOLZ. MILLING MACHINE.

(Application filed Mar. 26, 1900.)

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UNITED STATES PATENT OFFICE.

FREDERICK HOLZ, OF CINCINNATI, OHIO, ASSIGNOR TO THE CINCINNATI MILLING MACHINE COMPANY, OF SAME PLACE.

MlLLlNQ-MACHINIE.

SPECIFICATION forming part at Letters Patent No. 658,777, dated October 2, 1900.

Application filed March 26, 1900. Serial no. 10,211. (No model.)

To all whmn it may concern:

Be itknown that I, FREDERICK How, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Milling-Machines, of which the following is a full, clear, and exact description, reference .being had to the accompanying drawings, forming part of this specification.

My invention relates to that class of machines known as plain or universal milling-machines, wherein the Work-carrying table has all of the movements common to such machines; and its object is to provide simple and efficient mechanism whereby a greater number of speeds can be given to the Work-carrying table in its movements in any direction without stopping the machine or in any way interfering with its action,nnless under very high speeds.

The novelty of my invention will be hereinafter set forth, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1, Sheet 1, is a side elevation of a milling-machine embodying myinvention. Fig. 2, Sheet. 2,is a rear elevation of the same. Fig. 3,Sheet 3,is an enlarged sectional plan view of the boxing containing the rear end of the live-spindle and the mechanism connected therewith. Fig. 4, Sheet 3, is a sectional side elevation of Fig. 3 on the dotted line 0000. Fig. 5, Sheet 3, is a transverse sectional view on the dotted line y y of Fig. 4, looking to the right. Fig. 6, Sheet 4, is a central sectional plan View of the lower shifting box and the mechanism contained therein. Fig. 7, Sheet 4, is a sectional side elevation of the same on the dotted line 1 1 of Fig. 6. Fig. 8, Sheet 5, is a sectional end elevation on the dotted line 2 2 of Fig. 7, looking to the right. Fig. 9, Sheet 5, is a sectional view on the dotted line 3 3 of Fig. 10, Sheet 6, is an end elevation, partly in section, of the lower box, looking from the right of Figs. 6 and 7. Fig. 11, Sheet 6, is a front elevation of the changeable-gear-shifting mechan ism. Fig. 12, Sheet 7, is a side elevation of a box containing a modification in the construction of some of the devices. Fig. 13, Sheet 7, is an end elevation of Fig. 12, looking from the left. Fig. 14, Sheet 6, is a detached elevation of one of the cone-gears.

The same letters of reference are used to indicate identical parts in all the figures.

Referring to Figs. 1 and 2 in the general description of the machine, which may be of the usual or any suitable construction, and preferably of the construction shown in my prior patents, Nos. 554,422 and 554,423, dated February 11, 1896, it is only necessary to say that A is the main frame or standards of the machine, and B the cutter-arbor or live-spindle, journaled therein and driven by the usual cone-pulley C, with or without counter-shaft and back-gearing, as desired. On the front of the upright A is dovetailed the usual or any suitable knee F, which is given its upand-down movement by a screw G. Dovetailed on the knee is the saddle H, with horizontal movement to and from the standard A, and swiveled on thesaddle and adjust able on its axis thereon is the monitor-housing J, to which is dovetailed the work-carrying table K. These parts, with the exceptions to be hereinafter pointed out, may be and preferably are of the construction shown and described in my prior patents, Nos. 544,422 and 544,423, above referred to, where all of these parts are automatically actuated by the machine at the will of the operator.

- Referring now to the mechanism for changing the speed of the feed of the work-carrying table in any of its various movements imparted from a common source, as in the patentsbefore referred to, reference is first made to Figs. 3, 4, and 5 in connection with Figs. 1 and 2, where L is a box or housing secured to the rear of the standard A and into which enters the rear end of the livespindle B,which carries on its end and fast thereto two spur-gears M N, of which the former is about three times the diameter of the latter. Likewise journaled in the box L and parallel with the spindle B is a stub-spindle O, on which is feathered a sleeve P, to which are made fast two spur-gears Q R, the former adapted to mesh with the gear N and the latter with the gear M.

Any suitable shifter for the sleeve P is provided, in this instance consisting of a fork a, embracing both sides of the gear Q and swiveled to the lower end of alever S, pivoted, as at b, to a stud on the box L and having an upwardly-projecting operating-handle and a lower pointer o to register with marks on the side of the box L. The adjustment is such that when the lever S stands vertical, as shown by the dotted lines, Fig. 1, both gears Q and R are out of mesh with the gears M and N and the entire automatic feeding of the work-carrying table is stopped,and in this position the feed of the work-carrying table in any direction may be done by hand in the usual or any suitable manner. VVhem the lever S is thrown to the left, as shown by the solid lines of Fig. 1, the gear Q is thrown into mesh with the gear N and the slowest rate of speed is imparted from the spindle B to the spindle O. \Vhen, on the other hand, the lever S is thrown from its vertical position to the right, the gear R is broughtinto mesh with the gear M and the fastest rate of speed is imparted from the spindle B to the spindle O.

Secured to the side of the standard A beneath the box L is a second box or housing T, havingjournaled in the upper part thereof a stubspindle U, Figs. 6, 7, 8, 9, and 10, and on this spindle U are made fast, side by side, as seen in Fig. '7, two gearsV W, of different diameters, in this instance the gear V being the larger. On the outer end of the spindle U within a divided spherical box-journal A is a beveled pinion B, fast to the spindle U and meshing with a similar pinion C, fast on the lower end of a shaft D, extending up and journaled in a similar spherical box-journal E, within which, as seen in Figs. 3 and 4, is a beveled pinion F, fast on the upper end of the shaft D and meshing with a similar pinion G, fast on the spindle 0, so that rotation is transmitted from the spindle O in the upper box to the spindle U in the lower box.

Loosely journaled on a fixed spindle H, Fig. '7, carried in suitable bearings in the box T and beneath the spindle U, are two sets of cone-gears I and J, in this instance composed of four gears each and tapering in the same direction and toward the upright A of the machine. No two gears of the two sets are of the same diameter, and the gear V meshes with the smallest gear of the cone I, while the gear V meshes with the largest gear of the cone J, so that both cones will have unequal rates of rotation.

In the rear of the box and mounted in journals d e is a shaft or spindle K, on which is feathered a gear L just in the rear of the two sets of cone-gears I J, and the journalbearings d e for the shaft K are carried on a slide M, attached to and suitably guided on the under side of the box T. (See Figs. 6, 8, 9, and 10.) The end of the shaft K is connected by a universal joint N to a shaft (see dotted lines, Fig. 1,) which extends forward and is connected to the main drivinggear of the feed-table mechanism in any suitable manner, but preferably in the manner described in my prior patents referred to.

Referring now to Figs. 1, 8, 9, 10, and 11, P are arms pendent from the slide M and carrying a tubular bearing Q, to which is secured and extends up at the forward end of the slide an index-plate R, of sector shape, in the outer arch of which are a series of engaging holes or notches f, with which engage a sliding locking-pin g, provided with an operating-button h on its outer end, which pin isjournaled in a sleeve 2', connected to an arm j, (see Figs. 8, 10, and 11,) whose lower end is fast to a shaft or spindle 70, having its bearings in the tubular bearing Q. Upon the opposite or rear end of the spindle 7c is seeured a sleeve Z, extending up from which is a segment-rack m, meshing with a sliding rack n, guided in the slide M just beneath the gear L and carrying a swiveled fork 0, embracing both sides of said gear at its lower edge, the construction being such that by pulling out the pin 9 and vibrating the army the rack m is vibrated and the gear Lis caused to slide along its spindle K to come opposite any one of the gears of the two cones I J. Pivoted on a stud 1), Fig. 10, )rojecting from the slide M, is a lever q, extending forward and provided with a spring-engaging lockingpin 1', the pin of which engages with any num ber of apertures or notches s, Fig. 1, in a segment-arm 25, carried by the slide M. Upon the hub of the lever q is a segment-rack u, Fig. 10, which engages with a fixed rack-bar 'v on the side of the boX or housing T. It results from this construction that upon first shifting lever j and locking its pin 9 in any of the notches or holesf the sliding gear L is brought directly opposite the predetermined gear of either of the two cones I J. Then upon operating the lever g the slide M, carrying the gear L, will be brought into mesh with the gear of the cone to which it is opposed, and the shaft 0 will be given the revolution requisite for the speed required for the work-carrying table. As soon as the lever g has thus brought the gear L into mesh with one of the cone-gears it will come to a position to bring its locking-pin 1 directly opposite one of the holes or notches s in the segment t and will become engaged therewith to lock the parts. In like manner the gear L when thrown back to the position of Fig. 6 can be shifted sidewise the entire length of the two cones I J, so as to be brought opposite to any one of them desired, and then upon operating the lever q, as above described, the whole slide, with its attachments, can be drawn forward to bring the gear L into mesh with any one of the gears of the two cones with which it is in line, and so the feed from the lower box last referred to, assuming it to have eight gears on its two cones, can be changed eight times when the gear M of the upper box is in mesh with the gear R and eight more times when the gear N of the upper box is in mesh with the gear Q, thus giving sixteen changes of rate of feed to the work-carrying table and varying its rate as often as required to suit the character of the work Without stopping the machine.

As a modification in the means for shifting backward and forward the slide M, I have shown in Figs. 12 and 13, in place of the leverq, its rack u, and horizontal segment i, a lever a, similar to the lever j, with the exception that it has a segment-hub b,in which is a cam-groove c, Fig. 13, which engages a pin 61, dotted lines, Fig. 12, fast on the slide M, so that by vibrating the lever a the slide M is drawn out or pushed in, just as before. The upper end of the lever a has a spring locking-pin e, engaging with a segment-piecef, provided with holes or notches g for the engagement of the pin 6'.

WVhile I have shown but two sets of gears in the upper box L, the one set being fast on the live-spindle B and the other set fast on the feathered sleeve P, yet it is evident that three or more sets of gears might be employed in the box L and operated by the shifting of the sleeve P to bring any pair of the sets into mesh, and thereby a much greater range of speed could be obtained for v the shaft 0 and the train ofgearing connected with it,which, as a consequence,would give a much greater range to the rates of feed, as will be readily understood.

In Fig. 1 I have shown the shaft 0 in dotted lines on the opposite side of the machine, connected by a universal joint with a stubspindle on the main driving-gear a which operates all of the mechanism of the various parts of the feed-table.

Having thus fully described my invention, I claim- 1. In a milling-machine, the combination of the work-support having its various movements, automatic driving mechanism for all of said movements, a pair of unequal-sized gears fast on the rear end of the live-spindle, a stub-spindle parallel with and adjacent thereto and carrying feathered gears to mesh alternately with the aforesaid gears, a shifter for said feathered gears, a second stub-spindle beneath the firstnamed stub-spindle, means for connecting said stub-spindles for simultaneous rotation, two gears of unequal size fast on said last-named stub-spindle, a

third stub-spindle below said second stubspindle and having loosely mounted thereon, but incapable of sliding, two cone-gears of unequal size with the smallest gear of the largest cone of which the larger gear of the second stub-spindle meshes and with the largest gear of the smaller cone of which the smaller gear of the stub-spindle meshes, a fourth stub-spindle in rear of and parallel with the third stub-spindle, a shiftable frame in which said fourth stub-spindle is carried, a gear feathered on said fourth stub-spindle, means for shifting said last-named gear laterally to bring it opposite any one of the gears of the two sets of cone-gears, means for drawing forward said stub-spindle and its feathered gear into mesh when set to mesh with the selected gear of the cone-gears, and a revoluble connection between said fourth stub-spindle and said automatic driver for the work-support, whereby a double shift of gears and speeds is obtained for the worksupport which shall be in multiples of two for each of the sets of cone-gears,substan tially as described.

2. In a milling-machine, the combination of the work-support having its various movements, automatic driving mechanism for all of said movements, a box secured to the rear upper part of the standard containing therein the rear end of the live-spindle on which is fast a pair of unequal-sized gears, a stubspindle parallel with the live-spindle and journaled in said box, feathered gears on a sleeve arranged to mesh alternately with the gears on the live-spindle, a shifting arm pivoted to said box and having jaws to engage one of said feathered gears, an extension of said feathered spindle into a suitable housing with a beveled gear on said spindle, a second beveled gear journaled in said housing and meshing with the first beveled gear, a shaft extending downward from said last-named gear and carrying a beveled pinion in a housing secured to a second box beneath the firstnamed box and secured to the upright of the machine, a beveled pinion on a stub-spindle meshing with the beveled gear last mentioned, two gears of unequal size fast on said lastnamed stub-spindle, a third stub-spindle below said second stub-spindle journaled in said second box and having loosely mounted thereon two independently-revoluble cone-gears of different sizes, the smallest gear of the larger cone constantly meshing with the larger gear of the spindle above it and the largest gear of thesmaller cone constantly meshing with the smaller of the spindle above it, a slide mounted in guides in the lower part of the second box having journaled at its rear end a stub-spindle on which is feathered a shiftable gear,a hollow spindle beneath said feathered stub-spindle and containing a rack and a projecting jaw engaging said shiftable gear, a segment-rack engaging the first-named rack, an operating-shaft fast to said segment-rack extending forward and supported in journals and carrying at the front of the box an indexto the side of the slide and carryinga segmentrack meshing with a fixed rack on the lower box and a locking-pin carried by said lever engaging an index-segment provided with holes or notches, whereby when the shiftable gear is brought opposite any one of the gears of the two cones and locked in position by its segment rack and pin the last-named lever may be operated to throw forward the slide tocause the engagement of the shiftable gear with the gear to which it is opposed and to hold it so locked and thus obtain the requisite speed of the feed of the machine, substantially as described.

3. In a milling-machine, the combination of the work-carrying table having automatic vertical and horizontal movements imparted from the live-spindle, the train of gearing for actuating the work-carrying table, the train of gearing actuated by the live-spindle, intermediate sets of cone-gears having different velocities imparted to them from the livespindle, and a variable-speed connection between said cone-gears, said trains of gearing and the work-carrying table, substantially as described.

4. In a milling-machine in which the speed of the work-carrying table is effected from the live-spindle, the combination of the train of gearing actuating the work-carrying table, the train of gearing from the live-spindle, intermediate sets of cone-gears having different velocities imparted to them from the livespindle, a variable-speed connection between said cone-gears, and a shaft connected by a universal joint wit-h the train of gearing actuating the work-carrying table,substantially as described.

5. In a milling-machine in which the speed of the work-carrying table is effected from the live-spindle, the combination of the train of gearing actuating the work-carrying table, the train of gearing actuated by the livespindle, intermediate sets of cone-gears having difierent velocities imparted to them from the live-spindle,a communicating shaft geared at one end to the live-spindle mechanism and at its opposite end to the conegear-driving mechanism, substantially as described.

6. In a milling-machine in which the speed of the workcarrying table is effected from the live-spindle, the combination of the train of gearing actuating the work-carryin g table, the train of gearing actuated by the livespindle, intermediate gearing between the gearing actuating the work-carrying table, a variable-speed connection between two lastnamed trains of gearing, and a communicating shaft geared at one end to the live-spindle mechanism and at its opposite end to the intermediate gearing, substantially as de scribed.

7. In a milling-machine, the combination of the feed-table-driving mechanism, and the spindle-driving mechanism, of a box containing a plurality of sets of cone-gears constantly driven by the spindle-driving mechanism, a sliding bearing beneath said box having journaled at its rear end a feathered shaft carrying a gear feathered and shiftable thereon so as to be brought opposite to any one of the gears of the sets of cone-gears, and a lock hand-leverwith connecting mechanism for throwing forward or backward said shiftable gear into or out of engagement with one of the gears of the cone sets, substantially as described.

8. In a milling-machine, the combination of the feed-table-driving mechanism, and the spindle-driving mechanism, of a box containing a plurality of sets of cone-gears constantly driven by the spindle-driving mechanism, a sliding bearing beneath said box having journaled at its rear end a feathered shaft carrying a gear feathered and shiftable thereon so as to be brought opposite to any one of the gears of the sets of cone-gears, a lock hand-lever with connecting mechanism for throwing forward or backward said shiftable gear into or out of engagement with one of the gears of the cone sets, a shifting fork embracing said shiftable gear, a rack and segment for operating said shifting fork and a hand locklever for holding said segmentrack in any of its adjusted positions, substantially as described.

9. In a milling-machine, the combination with the box T, the fixed rack Q) thereon, the hand-lever q engaged by a locking-pin with the segment 15, the slide M to which the lever q is pivoted, the segment to engaging with the rack 12, the shaft K carried by the slide M, the gear L feathered 0n the shaft K, the cone-gears I J, the power-transmitting shaft 0 leading to the table-driving mechanism, and a universal joint between the shafts O and K.

FREDERICK HOLZ. Witnesses:

OWEN N. KINNEY, EDWARD PECK. 

